<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<script>


    var a=2/0;
    //不报错 无穷大  Infinity
    console.log(a)


    console.log(b);

    console.log(111)
</script>

</body>
</html>